Scoop for separable fastener stringers



I 24 I z 25 M1 Dec. 13, 1949 H. MORIN 2,491,193

EPARABLE FAST-ENER STRINGERS Filed Aug. 25, 1944 I 2 Sheets-Sheet 1 l I M ATTORNEY Dec. 13, 1949 1.. H. MORIN 2,491,198

SCOOP FOR SEPARABLE FASTENER STRINGERS Filed Aug. 23,1944 2 Sheets-Sheet 2 INVENTQR. Lou/1r l9. Nor/n ATTORNEYS Patented Dec. 13, 1949 SCOOP FOR SEPARABLE FASTENER STRINGERS Louis n. Morin, Bronx, N. Y.

Application August 23, 1944, Serial No. 550,784

4 Claims.

This invention relates to what I term coreless double acting scoops capable of being formed as die castings without the use of core pins and the like, forming female couplings preventing transverse separation of coupled stringers. More particularly, the invention relates to scoops wherein the male and female couplings preventing transverse separation of coupled scoops comprise an angular arrangement of longitudinally spaced projecting and recessed portions at opposite sides and opposite surfaces of the scoops. Still more particularly, the invention relates to a scoop construction wherein the scoops of one stringer have male and female couplings which converge centrally of the scoops in an outward direction with respect to the tape edge and on the other stringer converge in an inward direction with respect to the tape edge, forming left and right stringers of each fastener unit, and still further, the invention deals with a novel method of forming scoops of the kind defined. The novel features of the invention will be best understood from the following description when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed, and in which the separate parts are designated by suitable reference characters in each of the views; and in which:

Fig. 1 is a side and sectional view of a part of the scoops of two stringers shown in coupled relationship with each other.

Fig. 2 is a section on the line 22 of Fig. 1.

Fig. 3 is a front edge view of a single scoop, such as shownin Fig. 4.

Fig. 4 is a sectional view through a pair of dies, diagrammatically illustrating the method of forming the scoops of one stringer;

Fig. 5 is a view similar to Fig. 4, showing the method of forming the scoops of a companion stringer;

Fig. 6 is a perspective view of a scoop formed by the dies of Fig. 5; and

Fig. '7 is a perspective view of a scoop formed by the dies of Fig. 4.

The present invention deals with the formation of what I call coreless double acting scoops of the general type and kind disclosed in my prior application Serial Number 531,618, filed April 18, 1944. These scoops distinguish from the scoops of the earlier application primarily in that the scoops of one stringer will have an angular arrangement of the coupling portions opposed to the angular arrangement of the coupling portion of the scoops of the other stringer to provide what might be termed left and right stringers.

It is essential that the coupling portions of adjacent scoops be oppositely formed, that is, that the coupling portion of the scoops of one stringer converge in a direction away from the tape edge (see Fig. 4), and the coupling portions of the scoops of the companion stringer converge in a direction toward the tape edge (see Fig. 5). This opposed angular relationship provides coupling engagement between left and right stringers, as will be more fully hereinafter set forth.

In Fig. 4 is shown a pair of dies l0 and II, having in adjacent abutting surfaces thereof registering cavities or impressions l2 and I3 which collectively will form what I will term right scoops It on the beaded edge I5 of a stringer tape It. On the parting line of the dies Ill and H is a gate passage I'I, through which heated casting material is injected from a nozzle diagrammatically indicated at iii in forming the castings.

At this time, it will be pointed out that the dies l0 and it may have any number of impressions or cavities l2 and I3 to form in a single casting operation a predetermined number of castings on the stringer tape, and this is also true of the dies 19 and 20, shown in Fig. 5 of the drawing.

The dies I9 and 20 have registering cavities 2i and 22 for collectively forming what I will term left scoops 23 on the beaded edge 24 of a companion stringer tape 25. The parting line of the dies i9 and 28 includes a gate passage 26 through which casting material is injected into the die cavities from a nozzle 21, as is well known in the art.

The scoops it have transversely arranged projections 28 on upper and lower surfaces thereof which are in vertical alinement at each side of the scoop body and inwardly of these projections are correspondingly alined recesses 29. The scoops 23 have projections 30, generally similar to the projections 28 and recesses 3i generally similar to the recesses 29. The only difference between the left and right scoops, is that the right scoops it have the walls defining the projections and recesses converging to the line or central ridge 32, located centrally of the scoops in a direction outwardly with respect to the beaded edge l5, Whereas the corresponding walls defining the projections 30 and recesses 3| converge inwardly to line or central ridge 33 in the direction of the beaded edge 24; however, the outer surface 34 of the scoops 23 are shaped to conform with the contour of the corresponding outer surfaces 35 or the scoops l4. The upper and lower surfaces of each of the scoops l4 and 23 are also preferably tapered to the side surfaces thereof and this is to provide clearance between coupled scoops, as at 36 in Fig. 1 of the drawing to permit bending or iiexure of coupled stringers. This tapering of the surfaces is indicated at 31 in Fig. 3 of the drawing, which figure illustrates the front edge view of one of the scoops 14. However, the same general tapered construction will be provided on the scoope 23.

The opposed angular relationship of the projections 28 and 30 and recesses 29 and 3| at opposite sides of each of the scoops l4 and 23, will provide in the coupled scoops means for looking or retaining the scoops against transverse separation, whereas the projections and recesses prevent the coupled scoops from lateral or pull apart separation. As seen in Fig. 1 of the draw ing, the projections 28 of the scoops l4 operate in the recesses 3| of the scoops 23, whereas the projections 30 of the scoops 23 operate in the recesses 29 of the scoops M.

It will be noted from a consideration of Fig. 2 of the drawing that the outer ends 34 of the scoops 23 do not conform with the walls 38 of the grooves 29 in the scoops I. This is primarily to maintain a finished surface 34 on the scoops 23, shaped similarly to the surface 35 of the scoops M.

It will be understood that scoops of the type and kind under consideration can be coupled and uncoupled by sliders movable in any direction on the stringers and regardless of the arrangement of the sliders thereon, as in other double action scoops of the kind under consideration. However, the stringers are made as lefts and rights in the sense that one stringer has scoops similar to the scoops I4, and the other stringer has scoops similar to the scoops 23.

In considering the converging relationship of the surfaces 31 f the scoops, this structure will form on upper and lower surfaces of the scoops centrally and longitudinally thereof ridges, as at 39 on the scoops l4, and 40 on the scoops 23 The ridges 39 and 40 form the highest points ir both projections and recesses of the scoops, or in other words, define the thickest longitudinal section through the scoops.

Considering the scoops individually, they comprise mounting and coupling end portions. the male and female couplings being arranged on the coupling end portions and in a sense, these coupling end portions are divided centrally and longitudinally into independent coupling sides. The male and female couplings at one side arr arranged angularly to those at the other side, on the same surface. However, the male and female couplings on opposed surfaces are in common vertical alinement. This is true of the scoops on left and right stringers, the only difference being that in one instance the angular couplings converge in the direction of the mount ing end on the scoops of one stringer and converge in a direction opposed to the mounting end on the scoops of the other stringer.

Considering the upper and lower surfaces of the left and right scoops, it may be said that the angularity of the right scoops is an inward angularity with respect to the tape edge or the mounting end portion of the scoops, whereas the angularity of the left scoops may be said to be outwardly. These scoop structures may also be defined as comprising horizontal substantially V-shaped projections and channels, the right scoop having the inward V, and the left scoop an outward V. While coupled scoops have a common angular relationship of the male and female coupling portions thereof, nevertheless, scoops of left and right stringers are different in structure and particularly arrangement of the male and female couplings. In other words, two left stringers or two right stringers could not be coupled together. This construction is quite contrary to conventional practices in fasteners of the kind under consideration wherein the scoops of each stringer are of common construction. While in some instances they are made lefts and rights, they do nevertheless employ coupling portions, each having male and female couplings, which are of the same general construction, although there have been some instances where one stringer would constitute the male part of the coupling and the other stringer would constitute the female part thereof. In the present instance, the scoops of each stringer have both the male and female coupling portions and further, these coupling portions are disposed on upper and lower surfaces which provide the double acting characteristics of the fastener, previously mentioned.

By virtue of the arrangement of the coupling portions, the pairs of dies l0ll and Ill-20, are free to move away from each other in ejecting the castings, the dies being movable at angles common to the angularity of the male and female couplings at each side of the scoop. In other words, instead of moving the dies perpendicularly to the side surfaces of the tapes, the dies will be moved in the angular relation to each other, clearly defined by the angularity of said male and female couplings. In this connection, it will also appear that the dies l0 and H move inwardly with respect to the tape edge. whereas the dies l9 and 20 move outwardly with respect to the tape edge.

For purposes of description. the male and female couplings 28-49 and 303|, may be defined as of winged contour or wing formation. in that they diverge from the central portion in wing like fashion to opposite side surface". of the scoops. The right scoop may be defined as having inwardly directed winglike coupling portions or wing ends with respect to the mounting end portion of the scoop and the left scoop as having outwardly directed winglike coupling portions.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A scoop for separable fastener stringers, said scoop having a longitudinal lineal ridge dividing the scoop into longitudinal halves, said scoop being divided transversely into a coupling end portion and a mounting end portion, the coupling end portion having longitudinally spaced projections and recesses extending transversely across the entire width of the scoop, the projections and recesses of one longitudinal scoop half converging with the projections and recesses of the other half from points on the longitudinal edges of the halves to a point on said ridge longitudinally spaced from said firstmentioned points, said converging projections and recesses intersecting at said ridge.

2. A scoop for separable fastener stringers, said scoop having a longitudinal lineal ridge dividing the scoop into longitudinal halves, said scoop being divided transversely into a coupling end portion and a mounting end portion, the coupling end 'portion having longitudinally spaced projections and recesses extending transversely across the entire width of the scoop, the projections and recesses of one longitudinal scoop half converging with the projections and recesses of the other half from points on the longitudinal edges of the halves to a point on said ridge longitudinally spaced from said firstmentioned points and in a direction towards the mounting end portion of the scoop, said converging projections and recesses intersecting at said ridge.

3. A scoop for separable fastener stringers, said scoop having a longitudinal lineal ridge dividing the scoop into longitudinal halves, said scoop being divided transversely into a coupling end portion and a mounting end portion, the coupling end portion having longitudinally spaced projections and recesses extending transversely across the entire width of the scoop, the projections and recesses of one longitudinal scoop half converging with the projections and recesses of the other half from points on the longitudinal edges of the halves to a point on said ridge longitudinally spaced from said first-mentioned points and in a direction away from the mounting end portion of the scoop, said converging projections and recesses intersecting at said ridge.

4. A scoop for separable fastener stringers, said scoop having a longitudinal lineal ridge on its upper and lower surfaces dividing the scoop into longitudinal halves, said scoop being divided transversely into a coupling end portion and a mounting end portion, the coupling end portion having on both upper and lower surfaces thereof longitudinally spaced projections and recesses extending transversely across the entire width of the scoop, the projections and recesses on the upper and lower surfaces of one longitudinal scoop half converging with the projections and recesses on the corresponding sur- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,082,619 Dau June 1, 1937 2,331,618 Morin Oct. 12, 1943 FOREIGN PATENTS Number Country Date 459,959 Germany of 1928 561,414 Germany Oct. 14, 1932 627,793 Germany Mar. 12, 1936 

